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http://hdl.handle.net/2445/175906
Title: | Unravelling the elusive antiferromagnetic order in wurtzite and zinc blende CoO polymorph nanoparticles |
Author: | Roca, Alejandro G. Golosovsky, Igor V. Winkler, Elin López-Ortega, Alberto Estrader i Bofarull, Marta Zysler, Roberto D. Baró, M. D. Nogués, Josep |
Keywords: | Ferromagnetisme Nanopartícules Zinc Ferromagnetism Nanoparticles Zinc |
Issue Date: | 26-Feb-2018 |
Publisher: | Wiley-VCH |
Abstract: | Although cubic rock salt‐CoO has been extensively studied, the magnetic properties of the main nanoscale CoO polymorphs (hexagonal wurtzite and cubic zinc blende structures) are rather poorly understood. Here, a detailed magnetic and neutron diffraction study on zinc blende and wurtzite CoO nanoparticles is presented. The zinc blende‐CoO phase is antiferromagnetic with a 3rd type structure in a face‐centered cubic lattice and a Néel temperature of TN (zinc‐blende) ≈225 K. Wurtzite‐CoO also presents an antiferromagnetic order, TN (wurtzite) ≈109 K, although much more complex, with a 2nd type order along the c‐axis but an incommensurate order along the y‐axis. Importantly, the overall magnetic properties are overwhelmed by the uncompensated spins, which confer the system a ferromagnetic‐like behavior even at room temperature. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1002/smll.201703963 |
It is part of: | Small, 2018, vol. 14, num. 15, p. 1703963 |
URI: | http://hdl.handle.net/2445/175906 |
Related resource: | https://doi.org/10.1002/smll.201703963 |
ISSN: | 1613-6810 |
Appears in Collections: | Articles publicats en revistes (Química Inorgànica i Orgànica) |
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